Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas

T. Kobayashi; K. Ida; S. Inagaki; H. Tsuchiya; N. Tamura; G. H. Choe; G. S. Yun; H. K. Park; W. H. Ko; T. E. Evans; M. E. Austin; M. W. Shafer; M. Ono; D. López-bruna; M. A. Ochando; T. Estrada; C. Hidalgo; C. Moon; H. Igami; Y. Yoshimura; T. Ii Tsujimura; S. I. Itoh; K. Itoh

doi:10.1088/1741-4326/aa6f1f

Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas

T. Kobayashi, K. Ida, S. Inagaki, H. Tsuchiya, N. Tamura, G. H. Choe, G. S. Yun, H. K. Park, W. H. Ko, T. E. Evans, M. E. Austin, M. W. Shafer, M. Ono, D. López-bruna, M. A. Ochando, T. Estrada, C. Hidalgo, C. Moon, H. Igami, Y. YoshimuraT. Ii Tsujimura, S. I. Itoh, K. Itoh

Advanced Tokamak Physics

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

In this contribution we analyze modulation electron cyclotron resonance heating (MECH) experiment and discuss higher harmonic frequency dependence of transport coefficients. We use the bidirectional heat pulse propagation method, in which both inward propagating heat pulse and outward propagating heat pulse are analyzed at a radial range, in order to distinguish frequency dependence of transport coefficients due to hysteresis from that due to other reasons, such as radially dependent transport coefficients, a finite damping term, or boundary effects. The method is applied to MECH experiments performed in various helical and tokamak devices, i.e. Large Helical Device (LHD), TJ-II, Korea Superconducting Tokamak Advanced Research (KSTAR), and Doublet III-D (DIII-D) with different plasma conditions. The frequency dependence of transport coefficients are clearly observed, showing a possibility of existence of transport hysteresis in flux-gradient relation.

Original language	English
Article number	076013
Journal	Nuclear Fusion
Volume	57
Issue number	7
DOIs	https://doi.org/10.1088/1741-4326/aa6f1f
State	Published - May 17 2017

Bibliographical note

Publisher Copyright:
© 2017 IOP Publishing Ltd.

Keywords

Heat pulse propagation
Heat transport
Modulation ECH

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Kobayashi, T., Ida, K., Inagaki, S., Tsuchiya, H., Tamura, N., Choe, G. H., Yun, G. S., Park, H. K., Ko, W. H., Evans, T. E., Austin, M. E., Shafer, M. W., Ono, M., López-bruna, D., Ochando, M. A., Estrada, T., Hidalgo, C., Moon, C., Igami, H., ... Itoh, K. (2017). Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas. Nuclear Fusion, 57(7), Article 076013. https://doi.org/10.1088/1741-4326/aa6f1f

@article{d99813f25e7e47c0a5638acccbfe19f8,

title = "Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas",

abstract = "In this contribution we analyze modulation electron cyclotron resonance heating (MECH) experiment and discuss higher harmonic frequency dependence of transport coefficients. We use the bidirectional heat pulse propagation method, in which both inward propagating heat pulse and outward propagating heat pulse are analyzed at a radial range, in order to distinguish frequency dependence of transport coefficients due to hysteresis from that due to other reasons, such as radially dependent transport coefficients, a finite damping term, or boundary effects. The method is applied to MECH experiments performed in various helical and tokamak devices, i.e. Large Helical Device (LHD), TJ-II, Korea Superconducting Tokamak Advanced Research (KSTAR), and Doublet III-D (DIII-D) with different plasma conditions. The frequency dependence of transport coefficients are clearly observed, showing a possibility of existence of transport hysteresis in flux-gradient relation.",

keywords = "Heat pulse propagation, Heat transport, Modulation ECH",

author = "T. Kobayashi and K. Ida and S. Inagaki and H. Tsuchiya and N. Tamura and Choe, {G. H.} and Yun, {G. S.} and Park, {H. K.} and Ko, {W. H.} and Evans, {T. E.} and Austin, {M. E.} and Shafer, {M. W.} and M. Ono and D. L{\'o}pez-bruna and Ochando, {M. A.} and T. Estrada and C. Hidalgo and C. Moon and H. Igami and Y. Yoshimura and Tsujimura, {T. Ii} and Itoh, {S. I.} and K. Itoh",

note = "Publisher Copyright: {\textcopyright} 2017 IOP Publishing Ltd.",

year = "2017",

month = may,

day = "17",

doi = "10.1088/1741-4326/aa6f1f",

language = "English",

volume = "57",

journal = "Nuclear Fusion",

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Kobayashi, T, Ida, K, Inagaki, S, Tsuchiya, H, Tamura, N, Choe, GH, Yun, GS, Park, HK, Ko, WH, Evans, TE, Austin, ME, Shafer, MW, Ono, M, López-bruna, D, Ochando, MA, Estrada, T, Hidalgo, C, Moon, C, Igami, H, Yoshimura, Y, Tsujimura, TI, Itoh, SI & Itoh, K 2017, 'Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas', Nuclear Fusion, vol. 57, no. 7, 076013. https://doi.org/10.1088/1741-4326/aa6f1f

TY - JOUR

T1 - Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas

AU - Kobayashi, T.

AU - Ida, K.

AU - Inagaki, S.

AU - Tsuchiya, H.

AU - Tamura, N.

AU - Choe, G. H.

AU - Yun, G. S.

AU - Park, H. K.

AU - Ko, W. H.

AU - Evans, T. E.

AU - Austin, M. E.

AU - Shafer, M. W.

AU - Ono, M.

AU - López-bruna, D.

AU - Ochando, M. A.

AU - Estrada, T.

AU - Hidalgo, C.

AU - Moon, C.

AU - Igami, H.

AU - Yoshimura, Y.

AU - Tsujimura, T. Ii

AU - Itoh, S. I.

AU - Itoh, K.

PY - 2017/5/17

Y1 - 2017/5/17

N2 - In this contribution we analyze modulation electron cyclotron resonance heating (MECH) experiment and discuss higher harmonic frequency dependence of transport coefficients. We use the bidirectional heat pulse propagation method, in which both inward propagating heat pulse and outward propagating heat pulse are analyzed at a radial range, in order to distinguish frequency dependence of transport coefficients due to hysteresis from that due to other reasons, such as radially dependent transport coefficients, a finite damping term, or boundary effects. The method is applied to MECH experiments performed in various helical and tokamak devices, i.e. Large Helical Device (LHD), TJ-II, Korea Superconducting Tokamak Advanced Research (KSTAR), and Doublet III-D (DIII-D) with different plasma conditions. The frequency dependence of transport coefficients are clearly observed, showing a possibility of existence of transport hysteresis in flux-gradient relation.

AB - In this contribution we analyze modulation electron cyclotron resonance heating (MECH) experiment and discuss higher harmonic frequency dependence of transport coefficients. We use the bidirectional heat pulse propagation method, in which both inward propagating heat pulse and outward propagating heat pulse are analyzed at a radial range, in order to distinguish frequency dependence of transport coefficients due to hysteresis from that due to other reasons, such as radially dependent transport coefficients, a finite damping term, or boundary effects. The method is applied to MECH experiments performed in various helical and tokamak devices, i.e. Large Helical Device (LHD), TJ-II, Korea Superconducting Tokamak Advanced Research (KSTAR), and Doublet III-D (DIII-D) with different plasma conditions. The frequency dependence of transport coefficients are clearly observed, showing a possibility of existence of transport hysteresis in flux-gradient relation.

KW - Heat pulse propagation

KW - Heat transport

KW - Modulation ECH

UR - http://www.scopus.com/inward/record.url?scp=85020862934&partnerID=8YFLogxK

U2 - 10.1088/1741-4326/aa6f1f

DO - 10.1088/1741-4326/aa6f1f

M3 - Article

AN - SCOPUS:85020862934

SN - 0029-5515

VL - 57

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 7

M1 - 076013

ER -

Analysis of higher harmonics on bidirectional heat pulse propagation experiment in helical and tokamak plasmas

Abstract

Bibliographical note

Keywords

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